"I don't know." She got up, suddenly, her eyes widening. She was going to say something. She stopped it. Ridiculous. Her nerves jumped. "Those children haven't anything dangerous out there, have they?" she said.
"Nothing but pipes and hammers. Why?"
"Nothing electrical?"
"Heck, no," said Henry. "I looked."
She walked to the kitchen. The buzzing continued. "Just the same you'd better go tell them to quit. It's after five. Tell them—" Her eyes widened and narrowed. "Tell them to put off their Invasion until tomorrow." She laughed, nervously.
The buzzing grew louder.
"What are they up to? I'd better go look, all right."
The explosion!
The house shook with dull sound. There were other explosions in other yards on other streets.